Comcast, the nation’s largest cable operator, got a ringing endorsement yesterday when billionaire value investor Warren Buffett disclosed that he bought a sizable chunk of the company’s shares.

Buffett’s investment vehicle, Berkshire Hathaway, bought 5 million shares in the Philadelphia-based cable company for $147.9 million, according to a state regulatory filing by Berkshire’s auto insurance unit Geico Corp., Bloomberg News reported.

The revelation was not included in Berkshire’s quarterly report filed this week with the Securities and Exchange Commission.

The filing stated that Geico bought the shares on April 30, just days after Comcast withdrew its hostile bid for Disney. Disney had an offer on the table for Disney for weeks, but was forced to abandon it after the media giant’s board of directors refused to negotiate and Comcast shares sank.

Also this week, Comcast announced it had reached a deal to carry the NFL Network, a 24-hour network owned by the National Football League.

As part of the deal, Comcast will offer video-on-demand content provided by the NFL.

Comcast has also lately been scouting opportunities to develop its own content, and is reportedly planning to launch a new 24-hour kids network in partnership with PBS.

Investors often scour Buffett’s filings for investment opportunities, and his investment in Comcast sent the company’s shares up 62 cents, or 2.3 percent, to close at $27.13.